huge problem converting ost to pst, maybe encrypted?

i have an ost from outlook 2010 that was on a corp network using exchange. we copied the ost to a usb flash and am trying to make it a pst file. every program we use to convert says there is no data but the ost is 870mb. i know there is data. The only clue to the problem is that when we got the file off the computer, it said it might encrypt it? how do we decrypt it?
I cannot find out what it had because the company took the laptop back and the division is no more since last week.
i have tried easyprofessional, ost2pst.exe, outlook recovery toolbox, and others. all either error or say there is no data. any help?

Ost and pst files are pretty simple things, have you tied mounting the ost as a database file in outlook and then tried exporting to pst

Because it has been encrypted, which is highly likey as it come from a corporate computer, them you won't be able to de-crypt it, it will have lots of security requirements including domain linking involved, which you are no longer apart off.
This is the reason why it would be encrypted to prevent it's removal from company property.

Had you give a try the tool at http://www.convert-osttopst ? They claims to convert encrypted ost to pst file. Just get the demo version and convert ost to pst. If it previews the components of ost file in demo version then you can go for the full version and get ost to pst converted

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